Typewriting machine



April 21, 1942. G. F. HANDLE Y 'IYPEWRITING MACHINE 2 Sheets-Sheet 1Filed Jan. 18, 1941 ear 6 1 mm nd/eg #6096 4TT0RNEY$ April 21, 1942;

G. F. HANDLEY TYPEWRITING MACHINE Filed Jan. 18, 1941 2 Sheets-Sheet 2INVENTOR leo ge FHand leg 642% 7 W e;

4; ATTORNEYS Patented Apr. 21, 1942 TYPEWRITING MACHINE George F.Handley, Glendale, N. Y., assignor to Royal Typewriter Company, Inc.,New York, N. Y., a corporation of New York I Application January 18,1941,.Serial No. 375,061

2 Claims.

This invention relates to. typewritingmachines, and more particularly totypewriter ribbon positioning and feeding mechanism. Mechanism embodyingthe invention may be employed advantageously for positioning and feedingtypewriter ribbons or strips of various kinds, but is especially adaptedfor positioning and feeding narrow carbon paper or like copying stripsof car bon.

In the feeding of certain kinds of strips-or ribbons, such as carbonribbons for photooffset copy, typing on multilith plates or hektographribbons for making imprints which are subsequently used for producingpositive copies, it is important to feed the ribbon at a ratecorresponding to the rate of carriage letter-spacing travel so as toassure the presentation of a fresh ribbon portion at the printingpointfor each new type impression. The construction disclosed herein asillustrating one embodiment of the invention is capable of feedingribbon in this way, but it will be apparent that the invention is notlimited in its application to mechanism for feeding any specific type ofribbon.

An object of the invention is to provide typewriter ribbon mechanism ofa simple and efficient construction operable in an improved mannor intimed relation to thetypewriter carriage letter-spacing travel.Generally stated, this object is accomplished by theinterposition ofsimple driving connections between the ribbon-feeding mechanism and acarriage draw band connected in the usual manner between the carriageand a driving motor, such as the conventional spring barrel.

Another object is to provide mechanism of the character referred toabove which may be easily applied as an attachment to a standardtypewriter in a manner facilitating the making of driving connectionsbetween the carriage and the ribbon-feeding mechanism.

Other objects will become apparent from a reading of the followingdetailed description, the appended claims, and the accompanyingdrawings, in which:

Figure 1 is a fragmentary top plan view of a typewriting machine withsome conventional parts omitted, and showing equipment embodying theinvention applied thereto;

Figure 2 is a longitudinal vertical sectional view taken on theirregular lines 2-2 of Figure 1; Figure 3 is a detailed transversesectional view taken on the line 33 of Figure l and drawn on an enlargedscale;

Figure l is a partial end elevation looking in the direction of thearrow IV in Figure 1, with some parts broken away, and drawn on an.enlarged scale; and v Figure 5 is a detailed sectional view of a onewaydrive ratchet or clutch drawn on an enlarge scale. I

Mechanism embodying the invention may be used in connection withtypewriters of various kinds. For the purposes of illustration, apreferred embodiment of the invention is shown applied to a Royalstandard typewriter including a main frame A and a carriage B mounted onthe frame for letter-spacing and return movementsv by meansof a ballrace frame rail 1 and a carriage rail 2. A platen C is mounted on thecarriage end plates 33, and is adapted to be rotated for line-spacing bya combined line-spacing and carriage return lever (not shown). Aspring-powered drum or barrel 4 journaled on the frame between the rightand left end walls thereof is connected to the carriage by a draw band 5for moving the carriage in theletterspacing direction, that is, to theleft as viewed in Figures 1 and 2. Such carriage movement is controlledby escapement mechanism of a'known or any suitable kind and which mayinclude an escapement wheel 6 journaled on an escapement frame (notshown) to rotate with a pinion 1 in: mesh with an escapement rack 8supported on,

the carriage B.

The spring barrel 4 is provided with a gear 9 which meshes with anddrives a pinion Ii for rotating a shaft H connected to mechanism fordriving the usual ink ribbon spools (not shown) The parts referred toabove may be of known construction and arrangement relative to eachother, and, considered alone or in combination with each other, they donot constitute the invention claimed herein. The invention resides inother parts to be described, and the combinations of such other partswith'each other andv with parts which previously have been describedEquipment for supplying and feeding ribbon D includes a ribbon supplymeans generally designated E mounted at the right-hand end of thetypewriter, and from which the ribbon D is adapted to extend past theprinting point to engage and be fed by a feed roll F mounted at theleft-hand end of the machine, from whence the ribbon extends to atake-up spool G, the feel roll F and take-up spool G being driven by adriving pulley H interposed between the carriage draw band 5 and thefeed roll and take-up spool, respectively. In operation, the drivingpulleyH is effective for driving the feed r011 Fand take printing pointwill correspond to or with the carriage travel so as to assure thepositioning of a fresh ribbon portion for each typing impression.

The driving mechanism tends to rotate the takeup spool G at such angularvelocity as would cause its effective peripheral velocity to be great:er than the peripheral velocity of the feed roll F. In this way theribbon D extending between the feed roll F and the take-up roll ismaintained taut so as to promote snug winding of the ribbon' on thetake-up spool.

Referring more particularly to the details of constructionofthe'illustrative embodiment of the invention, the ribbonsupply means Eincludes a supply spool l2 journaled on a bracket l3 secured as at l4 tothe main frame A, The ribbon D-extend's from the supply-roll 12 around aflanged guide roller I 5, and thence through the usual ribbon vibratorl6 and over a guide roller 0 I! journaled on a bracket I 8 secured as atI 8 to a plate [9 fixed by screws to the main frame A at the left-handend of the typewriter.

The feeding and ribbon take-up mechanism is mounted on a'sheet metalmechanism frame generally-designated 2| mounted at the left-hand end ofthe frame A by means of posts 22. The frame is provided with a U-shapedbracket portion 23 secured to the frame 2| as at 2424, and having avertical ear portion 25. A forwardly projecting extension 26 integralwith the frame 2| isprovided with a vertically extending ear 21. Asleeve 28 secured to the ear by means of a nut-29 cooperates with theear 2'! for journaling a shaft 30 which is parallel to the fore-and-aftextending, horizontal axis of the spring barrel 4. The shaft 30 isdriven by means to be described later for driving both the feed roll Fand the take-up spool G.

The feed roll F is secured by a set screw 3! to a shaft 32 extendingtransversely to the shaft 30 and journaled in vertical frame'ears 33and3 l at the end of the frame extension 26. A bevelgear 35 secured tothe shaft 32 meshes with a bevel gear 36 secured to the shaft 30 and ofthe same pitch diameter as the gear-35. Thus, the shaft 32 will bedriven at the same angular velocity as the shaft 30, and, since thediameter of the feed roll F is the same as the diameter of the pulley.H, the peripheral velocities of the feed roll and-pulley will beequal.

The ribbon take-up equipment is similar to that disclosed in thecopendingapplication of George Handley, Serial No. 359,119, filed September 30, 1940. It includes the take-up spool G mounted to turn freelyon a shaft 37 which is journaled on the frame plate 2| and bracketportion 23. A bevel gear 3B'fixed to the shaft 37 meshes with a bevelgear 39 fixed to the shaft 30. Impositive drive connectionsinterposedbetween the shaft 31 and the take-up spool G include a serrated orsaw-toothed ,wheel40 fast with the take up spool G and adapted tobedriven, by a'slipdrive pawl 4| pivoted as at 42 on an arm "43 securedby a set: screw 44 to thesh'aftfl;

A spring 45 urges the pawl 4| into engagement with the toothed wheel 40with such radial pressure that, when the shaft 31 and arm 43 arerotated, the take-up spool G will be driven impositively, the effectivetorque transmitted to the spool G being sufficient to maintain theribbon D taut. However, the spring 45 will yield so as to permitslippage of the pawl M on the wheel 40 and allow the spool G to lagbehind the shaft 31 so as not to exert too strong a pull on the ribbonD. In order to prevent the spool G from moving reversely, it is providedwith a finetoothed ratchet wheel 46 which is engaged by a back checkpawl 4'! pivoted as at 48 on the verti- -cal frame-ear'25of the frame2|, the back check pawl being urged into engagement with the ratchetwheel 46 by a spring 49.

In accordance withthe invention, the shaft 30, and, consequently, thefeed roll F and take-up spool G are driven from the carriage draw band 5during letter-spacing travel only. The driving pulley H which engagesthe -dr-aw=band 5 for effecting the drive is equipped with a bearingbushing 50 journaled on the sleeve 28. The pulley is held against axialdisplacement on the sleeve-by engagement of one end ofthe bushing 50with a shoulder 5| formed on the sleeve, and by engagement of the otherend of the bushing with a retaining washer 52 staked or otherwisesuitably secured to the sleeve. For promoting smooth and dependabledriving of the pulley H, it is provided with a rubber covering 53 whichis contacted by the draw band 5.

The ribbon-feeding and take-up equipment is mounted outwardly beyond theleft-hand end of the frame A, being thus easily attachable as a unitwithout revising the arrangement of the standardtypewriter parts, Foreffecting operative driving connection between the draw band 5 and theribbon-feeding and take-up mechanism without substantially changing thearrangement of the standardtypewriter parts, an intervening portion ofthe draw band 5 is arranged to extend generally to the left to thedriving pulley H, thence vertically upwardly to a flanged guide roller54 journaled as at55 on a frame ear 56, and thence another interveningportion extends to' the right directly overbut out of contact with thespring barrel 4 for connection to the carriage B as at 57.

When the carriage moves in the letter-spacing direction, the draw band 5will travel in the direction of the arrow a, and the spring barrel 4 andthe pulley H will be rotated counterclockwise as viewed in Figure 2.-Conversely, when the carriage moves in the return direction, or to theright, the spring barrel 4 and pulley H will rotate clockwise as-viewedin Figure 2. Inasmuch as it is desiredto feed the ribbon D in thedirection of the arrow 17 and rotate the take-up spool in the directionof the arrow 0 only during carriage letter spacing movements andcounterclockwise rotation'of the barrel 4 and pulley H, a one-way driveconnection is interposed between the pulley H and the shaft 30. Theone-way drive connection'shown herein is similar to that disclosed inthe copending application Serial No. 359,119 referred to -above.'-Itincludes a spring pawl 58 riveted as at 59'to the pulley H, and normallybeing engageablewith a toothed ratchet wheel 60 which is free on theshaft 30but is adapted to be-held in driving connection therewith byapin B-l fixed-to the wheel 80 and-extending into a slot 62 in acollar-63 secured-by a set: screw 64- to the sh'aft 3fl. 'A spring 65interposed between the collar 63 and the ratchet wheel 66 normally holdsthe ratchet wheel close to the pulley H for cooperation with the springpawl 58, so that, when the pulley H rotates counterclockwise as viewedin Figure 2, the shaft 30 will be rotated so as to drive the feed roll Fand take-up spool G. When the driving pulley H is rotated clockwiseduring return travel of the carriage, the pawl 58 will slip over theteeth of the ratchet wheel 60 so as not to drive the shaft 30, the feedroll F, and take-up spool G.

When the carriage is moved in the letterspacing direction duringtabulating operations, it is unnecessary and is wasteful to feed ribboncorrespondingly, and it therefore is desirable to disable the ratchet orclutch device 58-60 during tabulating operations. For accomplishingthis, a pin 66 mounted on a lever 61 pivoted as at 68 on the frame plateM is movable against a flange 69 on the ratchet Wheel 60 for pulling theratchet wheel away from the spring finger 58. A spring I0, however,normally maintains the lever 61 and pin 66 in positions permitting thespring 65 to hold the ratchet wheel 60 in position for engagement by thespring finger 58. The lever 61 may be operated in unison with thetabulating mechanism by means of a pull link H adapted to be connectedto the tabulating mechanism by means such as are disclosed in thecopending application 359,119 previously referred to.

The mechanism disclosed herein embodies the invention in the form nowpreferred, but it will be apparent that changes may be made withoutdeparting from the invention as defined in the claims.

I claim:

1. A ribbon feeding attachment for a typewriter including a main framehaving end walls, a carriage mounted on said frame for letter spacingand return travel, a motor driven barrel journaled on said frameintermediate said end walls to rotate about an axis transverse to thedirection of carriage travel, and a carriage draw band securedrespectively to said barrel and said carriage; said attachmentcomprising a mechanism frame adapted to be mounted on said main frameoutwardly beyond that end wall of said frame towards which said carriagemoves during carriage letter-spacing travel, ribbon feeding mechanismmounted on said mechanism frame and including a drive pulley, and meansso journaling said pulley on said mechanism frame that when theattachment is applied to the typewriter the pulley will be rotatableabout an axis parallel to said barrel axis and outwardly beyond that endwall of said main frame towards which the carriage moves duringletter-spacing travel, said pulley being adapted to be engaged by thecarriage draw band with the latter having a portion extending from saidbarrel generally in the direction of carriage letter-spacing movement toand in driving contact with said pulley and another portion extendingfrom said pulley and in the direction of carriage return movement to thepoint of attachment of the band to the carriage.

2. A ribbon feeding attachment for a typewriter including a main framehaving end walls, a carriage mounted on said frame to move to the leftfor letter spacing and to the right for return travel, a spring barreljournaled on said frame to-rotate about a horizontal axis extendingfore-and-aft of the typewriter and disposed between the right and leftend walls of the main frame, and a carriage draw band securedrespectively to said barrel and said carriage; said attachmentcomprising a mechanism frame adapted to be mounted on said main frameoutwardly beyond the left end wall thereof, ribbon feeding mechanismmounted on said mechanism frame and including a drive pulley, a guideroller and means so journaling said pulley and roller on said mechanismframe that when said attachment is applied to the tyepwriter the pulleyand roller will be rotatable respectively about spaced axes parallel tosaid barrel axis outwardly beyond the left end wall of said main frame,the pulley and roller being so positioned as to be engaged by the drawband with the latter extending from said spring barrel to the left toand in peripheral contact with the pulley, thence extending upwardly andin peripheral contact with said roller, and thence extending to .theright above and out of contact with said spring barrel and to the pointof attachment to said carriage.

GEORGE F. HANDLEY.

